Custodian of an Inanimate Object: Automatic Liability, Unless External Cause

Imagine: you are a property owner in La Baule-Escoublac. One summer afternoon, your car parked on the pavement, with the door ajar, is hit by a passing cyclist. The cyclist falls and is injured. Who pays? You, because your car is involved? Him, because he was cycling too fast? Or no one, because it was an accident?

This is the question the Court of Cassation decided in a landmark ruling of 3 February 1965, known as the "Grands Moulins de Strasbourg" decision. This ruling established a clear principle: the custodian of an inanimate object (your car, a tree, a wall) is strictly liable for the damage it causes, unless he proves that the damage is due to an external cause for which he cannot be held responsible – such as the exclusive act of the victim or a third party, which was unforeseeable and irresistible.

In practice, this decision has immense consequences for all property owners, tenants and real estate professionals. It imposes increased vigilance over everything you own or control. Let us look at the facts, the reasoning of the judges, and what this means for you, concretely.

The facts: a story like many that happen every day

Let us return to the case decided in 1965. It all begins in Strasbourg, in a busy neighbourhood. A child, a few years old, is walking with his mother on the pavement. Suddenly, he falls from the car he was in – apparently, the door opened. In his fall, the child is hit by a lorry belonging to the company Grands Moulins de Strasbourg, which was driving nearby. The child is seriously injured.

The child's parents then sue the company Grands Moulins de Strasbourg and its insurer, Alpina, for compensation for the harm. They argue that the lorry is the cause of the damage and that its custodian (the company) must be held liable. For its part, the company argues that the child's fall is due to a fact external to it – perhaps a faulty door closure, or an act of the child himself. But the judges of the Court of Appeal, in their decision, hold the company liable without examining whether the child's act (or that of a third party) may have contributed to the damage.

The company appeals to the Court of Cassation. The Court of Cassation quashes the appeal judgment. It recalls that the custodian of the inanimate object (the lorry) is strictly liable, but may be exonerated by proving an external cause. And above all, the lower courts must investigate whether the act of the victim or a third party, even without fault, contributed to the occurrence of the damage. In this case, the Court of Appeal had simply ruled out the fault of a third party, without checking whether his act, even if non-faulty, had participated in the accident. The Court of Cassation therefore quashes the judgment and refers the case to another Court of Appeal.

The reasoning of the court — explained

The reasoning of the Court of Cassation is based on Article 1240 of the Civil Code (formerly 1382) – which requires reparation for damage caused by fault – but above all on Article 1242 paragraph 1 (formerly 1384 paragraph 1), which establishes liability for things under one's custody. The Court specifies that the custodian of an inanimate object is strictly liable, i.e., without needing to prove fault on his part. It suffices that the thing caused the damage.

But this liability is not absolute. The custodian may be discharged if he proves that he was unable to avoid the damage due to an external cause for which he cannot be held responsible. This external cause may be force majeure (an unforeseeable and irresistible event), the exclusive act of the victim, or the exclusive act of a third party. In all cases, the act must be unforeseeable and insurmountable for the custodian.

What is innovative in this ruling is that the Court requires the lower courts to investigate whether the act of a third party, even devoid of any fault, contributed to the occurrence of the damage. In other words, it is not enough to say that the third party did not commit a fault; it is still necessary to check whether his intervention, even involuntary, played a role in the accident. If so, to what extent? And was this act foreseeable and surmountable by the driver of the vehicle?

In this case, the Court of Appeal had held the company liable without answering these questions. The Court of Cassation criticises it for having made the custodian's exoneration conditional on the fault of a third party, whereas the mere act of the third party (even non-faulty) may be a ground for partial or total exoneration. This is an important development: it strengthens the custodian's rights by offering him a broader defence.

What this means for you — concretely

For a landlord in Pornic, this decision means you are automatically liable if a tenant or visitor is injured due to an element of your property: a defective staircase step, a falling tree, a collapsing fence. You cannot simply say "it's not my fault." You must prove that the damage is due to an unforeseeable external cause, such as an exceptional storm or an act of vandalism by a third party.

For a tenant, be careful: if you rent a flat, you are considered the custodian of the things you use (furniture, equipment). If a friend is injured on your insecure balcony, you could be held liable. Check your civil liability insurance.

For a buyer, this case law protects you: if you buy a property and a hidden defect (a non-apparent defect) causes damage, you can pursue the seller on the basis of the warranty against hidden defects. But be careful, if you are the custodian at the time of the damage, you will be the first to be pursued.

Example with figures: in Nantes, a court ordered a property owner to pay €15,000 to a pedestrian who fell on a pavement slab raised by the roots of a tree belonging to the owner. The court held that the owner, as custodian of the tree, had not proved that the fall was due to an external cause (the victim was walking normally).

If you are in this situation, you must: immediately secure the premises, take photos, gather witness statements, and consult a lawyer to prepare your defence. The limitation periods are 5 years for non-contractual liability (Article 2224 of the Civil Code).

Four tips to avoid this type of dispute

• Inspect your property regularly: Once a year, check your walls, fences, trees, roofs. Repair any apparent defect without delay. In La Baule-Escoublac, a client avoided a lawsuit by replacing a wobbly gutter reported by his neighbour.
• Take out appropriate civil liability insurance: Check that your policy covers damage caused by the things of which you are custodian. A landlord in Pornic was indemnified to the tune of €20,000 after a branch fell on a car.
• Document third-party interventions: If work is done by a neighbour or a company, keep quotes, invoices, before/after photos. This can prove that the damage is due to a third party's act.
• React quickly in the event of an accident: Notify your insurer within 5 working days, do not admit liability, and have the premises inspected by a judicial officer (formerly bailiff) if necessary.

Further reading: related case law and developments

This 1965 decision is part of a line of rulings that built liability for things. Before it, the "Jand'heur" ruling (1930) had already established the principle of strict liability of the custodian for inanimate objects. But the 1965 ruling refines the regime by specifying the conditions for exoneration by the act of a third party.

More recently, the Court of Cassation has recalled that the custodian may be partially exonerated if the external cause is only partially exonerating (for example, the victim was imprudent, but so was the custodian). In a ruling of 10 September 2020 (no. 19-16.123), it held that the act of the victim, even if non-faulty, may reduce the custodian's liability. The trend is therefore towards a more nuanced assessment of grounds for exoneration.

For the future, expect judges to closely examine the behaviour of the victim and third parties, even in the absence of fault. This means you must be able to prove that you did everything possible to avoid the damage.

Summary and next steps

Here is a checklist of actions to take if an accident occurs at your home or with a thing of which you are custodian:

1. Do not panic – Do not admit liability verbally.
2. Secure the area – Prevent another accident from occurring.
3. Gather evidence – Photos, videos, witness statements, friendly report.
4. Report to your insurer – Within 5 working days, by registered letter with acknowledgement of receipt.
5. Consult a lawyer – To assess your liability and prepare your defence.

Are you in a similar situation? A first 30-minute consultation with Maître Zakine (€45) can save you months of proceedings — and often much more. Book an appointment →